Boring machine



May 5, 1931- G. v\(ANDERBEEK 1,803,740

BORIN'G MACHINE Filed Oct. l2. 1929 5 Sheets-Sheet l 62 @mi Vmmrbee/r,

May 5, 1931. G. VANDERBEEK BORING MACHINE Filed Oct. l2, 1929 3 Sheets-Sheet 2 May 5, 1931. G. VANDERBEEK 1,803,740

i BORING' MACHINE Filed oct. 12, 1929 3 sheets-smelt 7 Patented May 5, 1931 ETE 'EAT ES PATENT OFFICE GERRT VANDERBEEK, OF BELGIT, XVISCONSIN, ASSIGNOR TO `YATESAMERICAN lll/.-V

CIENE COMPANY, OF BELOIT, WISCONSIN, A CORPORATION OF DELAWARE i notame- Meer-inve Application filed October 12, 1929. Serial No. 399,180. i

This invention has to do with multiple' bit boring machines of the type in which the work is placed on. a vertically reciprocating table and raised into engagement with the bits.

Heretofore, in using machines of the type under consideration,l dilllculty has been eX- perienced in getting the bits to bore to the desired depth with any degree of uniformity,

Y owing to the fact that the resistance offered by different pieces of Worli varies considerably because of hardv spots,y knots, grain irregularities, ete., in the same, and it is almost impossible to make the portion of the frame which supports the bits "sufficiently rigid to 'i prevent. the same from yielding' under the stressesset up at the instant that thetable passes through the uppermost portion of itsl movement. Furthermore,A in thefvmachines rheretofore used, it has been the practice to raise and lower the table mechanically, and

difficulty has been experienced in working out a satisfactory control for the same..

VThe object of the presentginvention is to provide a multiple bit boring` machine in which the bits will always bore to the full depth for which set regardless of the resistance encountered; in which the table for the work is raised and lowered by hydraulic power; and in which the movement of the table may be controlled either automatically, semi-automatically, or manually, as desired.

Vhi'le the foregoing statements are indica- Vtive in a general way of the nature of the invention, other objects and advantages will be apparent to those skilledin the art upon a full understanding of the construction, arrangement and. operation of the improvements com*v stituting the subject matter of the invention.

One form of the invention is presented herein for the purpose of exempliflcation, but it will of course be appreciated that the invention issusceptible of embodiment in other structurally modified forms coming equally within the scope of the appended claims.

1n the accompanying drawings:

Fig. 1 is a perspective view of a multiple bit boring machine equipped with the table Oplatng .controlling the im vention; l

Fig. 2 is afragmentary end view of the machine;

Fig. 3 is a fragmentary horizontal section, taken on the line 3-3 of Fig. 2;

Fig. 4 is a fragmentary vertical section, taken on the linev M of Fig.` 3; and

Fig. 5 is a fragmentary vertical section, taken on the line 5 5 of Fig. e.

The machine which is shown in the drawings includes aV frame 10, a number of rotating bits 11, and a vertically reciprocating table 12 on which the work to be bored is placed and raised into engagement with the bits. The bits 11 are carried by the upper portion of the frame, and may be arranged, mounted and operated in accordance with well known practice or in any other desired manner. VThe `table 12 is supported in the i lower portion of the frame, and is provided at its ends with downwardly extending slide plates 13 which travel up and down between spaced parallel guide strips 141-. Y

V ylhe' table 12 is raised and lowered by oil oryother suitableliquid, the oil being forced vunder pressure by a motor driven pump 15 into first one Yend of a cylinder 16 and then V'the other through pipes 17 and 18 which extend from the pump to the ends of the cylinder. yThe cylinder 16 contains a closely fitting piston 19, and a long piston rod 20 is attached to the piston and extends forwardly from the front end of the cylinder into a casing 21, where it is connected at 22 with the free end of a lever 23 whichV is secured to a long sturdy rock shaft 9A. The rockv will be lowered. The` flow of theoil, first throughl the pipe' 17 andvthen through-the Vpipe 18, is initiated by changes made in the realice a .redl ,27; Weit4 i0@ @Perales f1 slide valve 28 of well known construction communicating with the pump 15 and the pipes 17 and 18. When the rod 27 is placed in an intermediate position, the valve will prevent any of the oil from being forced through either the` pipe 17 or the pipe 13. lVhcn the rod 27 is shifted to the left, into what will be hereinafter referred to as the raising position, the valve will open conimunication between the pump and the pipe 17. lillhcn the rod is shifted to the right., iu what will be called the lowering position, th f valve will establish communication between the pump and the pipe 18. In the particolar position shown in Fig. 2, the valve is set to establish communication between the pump and the pipe 17, and the table 12 therefore in the act of commencing its upward movenient.

The movement of the table 12 is determined by the position in which an easily manipulated control rod 29 is placed by the operator. The control rod 29 extends along the front of the machine below the level of the table and is provided with one or more conveniently located handles 30. The control rod may be oscillated in either direction, or it may be shifted axially into any one of three different positions. The right end of the control rod is both rotatably and slidably supported in a hearing bracket 31 which is attached to the frame, while the left end slidably telescopes over and is non-rotatably splined with a short continuation shaft which is journaled in a bracket 33 on the frame.

The telescoping portions of 'the control rod 29 and the shaft 32 are enclosed within a housing 34 which is mounted on the braclet 33, and the left end of the shaft 32 is keyed to a short upwardly extending arm 35 which is pivoted at its upper end to the front end of a rearwardly extending rod 36. rllhe rod 36 is supported adjacent its rear end in a freely sliding sleeve 37 wl ich is pivoted to the upper en d of an arm 38 on the left end of the rock shaft 24. lVhen the rock shai lates in raising or lowering the table, the sleeve 37 slides along the rod 36 between two adjustably positioned abutment lugs 39 and 40 on the rod. lVhen the table 12 reaches the upper end of its travel, the sleeve 37 moves into engagement with the lug 39 and shifts the rod 36 rearwardly a short distance, and, when the table reaches the lower end of its travel, the sleeve moves into engagement with the lug 40 and shifts the rod forwardly a short distance.

The previously described valve rod 27 is connected by a short link 41 to one arm 42 of a bell-crank lever which is journaled in the adjacent end of the frame, and the other arm 43 of the bell-crank lever, which is located on the inside of the frame and eX- tends in the opposite direction from the arm 42, is pivoted at 44 to the rear end of a forwardly extending rod 45. The front end of the rod 45 is pivoted at 46 to the upper end of a tiltable block 47 which is positioned within the housing 34, and the lower portion of the block is rotatably mounted on a bushing 48 which is keyed to the previously Clescribed shaft 32. Any relative rotation between the block 47 and the bushing 48 is yieldingly resisted by the action of two springs 49 and 50. The springs are compressed in bores in the block by two plungers 51 and 52 which are pivoted to the bushing 48 in recesses 53 and 54 formed in opposite sides of the same.

The block 47 is provided with two segments 55 and 56 which are partially set into the periphery of the block to present latching abutments for coaction with the two dogs 57 and 58. The dogs are pivoted at 59 and 60 to the bracket- 33 and are urged toward the periphery of the block by springs 61 and 62. The dogs are provided adjacent their front ends with shoulders 63 and 64 which interlock respectively with the lower ends of the segments 55 and 56. The segments are arranged with the lower ends thereof a little closer together than the shoulders on the dogs, so that the block cannot be latched against Inovement in both directions at the same time.

The segments are released at certain times from the dogs by means of two cams 65 and 66 which are adiustably fastened to a plate 67 which is keyed to the shaft 32 at the right ends ofthe block 47 and the bushing 48. The cams are adapted to ride under two rollers 68 and 69 on the free ends of the dogs, whereby to force the latter out away from the segments when the shaft 32 is oscillated far enough in either direction to bring one of the cams into contact with one of the rollers.

Either the dog 58 alone, or the dogs 57 and 58 together, may be swung back away from the segments into inoperative positions through the instrumentality of a pin 70, which pin passes loosely through a guide aperture 71 in the lower portion of the housing 34. The pin is provided intermediate its ends with a beveled shoulder 72 which merges into a portion 73 of increased diameter, and is carried by a bracket 74 which is liournaled between two confining collars 7 5 and 76 on the left end of the control shaft 29. When the control shaft is merely oscillated in one direction or the other, without being shifted axially, the pin 70 docs not move at all, but, when the control shaft is shifted axially, the pin obviously shifts with it. At points above the pin 70, the dogs 57 and 58 are provided with tail portions 77 and 78, which portions are cammed by the beveled shoulders 72 on the pin up onto the enlarged portion 73 of the pin when the latter is shifted toward the left. When the pin is in the extreme right position shown in Fig. 4, both of the dogs are free to interlock with the segments. l/Vhen` the pin is shifted Vby the control rod 29 into an extreme left position, both dogs are rendered inoperative. When the pin is shifted by the control rod into an intermediate position, only the dog 57 is free to latchwith the segment 55, the dog 58 being rendered inoperative by reason of the fact that the tail portion on that dog is opposite the enlarged portion of theV theleft as far as it will go, thereby causing'v both of the locking dogs 57 and 58 to be swung out away from the paths of, travel of the segments` 55 and 56 into inoperative positions. As long as the handles 30 on the control shaft are in a horizontal position, the table 12 will remain stationary, but as soon as the control shaft is oscillated by the operator into a position wherein the `handles are inclined downwardly, the resistance of the springs 49 and 50will causev the block 47 to be correspondingly tilted, with the resultthat the rod 45 will act on the rod 27 through the arms 42 and 43 of the bell-crank Vlever to shift the valve 28 into a position wherein the pipe 17 is placed in communicationwith the pump 15, causing the table to move upwardly.

`When the table reaches the upper end of its travel, the sleeve 37 rides against the lug 89 and shifts the rod 36E rearwardly, thereby turning the control shaft back into its neutral position. Since the springs 49 and 5) cause the block 47 to turn with the control rod, the rods 27 and 45 arey consequently shifted back into their neutral positions, and the valve 28, as a result, closes ott communication between the pump and the pipe 17, bringing the table instantly to rest .in its uppermost position.

he uppermost position of the table is determined bythe setting of the adjustable lug 89 on the rod 36. Similarly, the lowerrnost position is determined by thev setting off the adjustable lug 40.

`'lo bring the table down again whenever desired, it is merely necessary to swing one of the handles Yon the control rod into an upwardly inclined position, whereupon, the

block 47 will be tilted rearwardlyV and theV rods 45 and 27 will cause the valve 28 to: shift into a position wherein the pumpis placed in communication with the pipe 18. Y

At any time during either the upward or the downward ltravel of the table, the operator may instantly stop the same by merely swinging one of the handles on the control rod back again into a horizontal position,

since theA control rod, as long as the dogs 5l and 58 remain inoperative, acts through the springs 49 and 50, the block 47 and the rods 45 and 27 to neutralize the valve. The table can also be started upwardly or downwardly'm from any position in which it has been stopped by merelyV swinging one of the handles on the control rod into eithera downwardly inclined position or an upwardly inclined position, depending on the direction'i of movement desired.V When the handle is swung downwardly, the table will go up, and, when-the handle is swung upwardly, the table will go down. Y

To cause the machine to operate automati-' cally, with the table traveling continuously up and down without stopping, the control rod, with the handles extending horizontally, is shifted to the right as far as it will go, therebycausing the'pin 70 to release the dogs 57(85 and 58 and allow the freev ends of the dogs to press against the outer faces of the segments 55 and 56. One of the handles 8O is then swung downwardly, whereby to tilt the block 47 fowardly into the position shown in FigiV 90 in which position the shoulder 68 on the dog 57 interloc'lzs with the lower edge of the segment 55 and prevents return movement of the block. As soon as the block 47 assumes such position, the table commences its 11p-"95 ward travel. Y y Y y y lVhen the table reaches the upper end of its movement, the sleeve 37 moves into engagement with the lug 39 on thel rod'86 and shifts the rod rearwardly, causing the' sha-ft 82,100`

together with the bushing 48 and the control rod 29, to oscillate in a counter-clockwise direction as viewed from the left end of the machine. VDuringthe iirst part of such oscillation, the block 47 is prevented by the" 105 dog 557 from moving, but, after the oscillation has progressed to the point where the cam 65 has moved downwardly into vContact with the roller 68 on the dog 57, during which time the spring 50 has become compressed,`the 110 dog 57 is tripped from the segment 55 and the energy stored up in the spring 50 kicks the block over through a greater anglethan the bushing 48would have turned it were it j not latched, the extent to which the block 47,115

is thus tilted to the rear being great enough to allow the shoulder 64 on the free end of the other clog 58 to engage under and interlock with the lower edge of the segment 56.

whereby to hold the block in that position; 1120 The block 47, when tiltedrearwardly by the spring` 50, shifts the valve 28 past the neutral position to the position wherein the pipe 18 is placed in communication with the pump,

. with the result that the table starts to move downwardly.

`When the table reaches its lowermost position, the sleeve 87 moves into engagement with the lugll-O on the rod 36, causing the the control rod 29, to be oscillated in a clockwise direction as viewed from the left end ot the machine. During the first part of such oscillation, the block i7 is prevented from moving' with the bushing` because of the interlocled relation between the segment 56 and the defi; but, when the cam 66 reaches the roller (Si) on the den' 58, it forces the free end of the dog outwardly away from the segment and allows the springy i9, which has been compressed by the stationary condition of the bloelr, to forcibly lriclr the block over beyond the position to which the bushing would normally carry it and into the latched position shown in Fig. 5, whereupon the cycle above described is automatically repeated, the table raising and lowering continuously without attention until stopped by the action of the operator in shifting; the control rod 29 to the left.

To obtain a semi-automatic operation of the ma chine-wherein the table comes to rest in its lowermost position after moving up and down oncchthe control rod 29, with the handles 30 extending; horizontally, is shifted aX- ially into a position midway between the previously described automatic and manual control positions, thereby causing the pin 70 to hold only the dog' 58 out of operation. One of the handles 30 is then swung downwardly far enough to allow the shoulder G3 on the dog 57 to catch under the lower end of the segment 55, whereupon the pipe 17 is placed in communication with the pump 15 by the valve 28 and the table commences to travel upwardly.

When the table reaches its uppermost position, the sleeve 37 acts through the lug 39 and rod 36 to oscillate the shaft 32, bushing 4,8 and control rod 29 in a countercloclrwise direction, and, as soon as the cam reaches the r ller 68 on the doe,l 57 and releases the latter, the compression built up in the spring' 50 forcibly lriclrs the block 47 far enough rearwardly to shift the valve 28 past the neutral or shut olf position into a position wherein the pump is placed in communication. with the pipe 18, causing` the table to descend. Since the dog 58 is being* held by the pin 70 in an inoperative position` the block does not become latched in such rearwardly tilted position.

YVhen the table thereafter reaches its lowermost position, the sleeve 37 acts to oscillate the shaft 32, bushingr 48 and control rod 29 in a clockwise direction, and the springs 49 and 50 cause the block t7 to oscillate with the bush' C. As soon the block has moved far enough to shift the valve 28 into neutral, the -flow of oil to the cylinder ceases and the table comes to rest, in readiness for another such cycle of operation as soon as one of the handles 30 is a gain depressed by the operator.

lf desired, in the semi-automatic operation of the machine, a foot pedal 79 may be used to initiate each cycle of operation. The pedal 79 is pivoted to the bottom of the frame at S0 and is provided with an upwardly extending` link 81 which has a longitudinally extending` slot 82 in its upper end. in arm 83 is secured to the control shaft a d is provided at its free yend with a pin 8f?.- whch entends laterally into the slot in the link. Then the pedal 7 9 is depressed, the lower end of the slot S2 engages with the. pin Sil and swings the arm 83 upwardly to oscillate the control shaft in the same direction as the handles 30 oscillate it when swung into downwardly inclined positions, the extra length of the slot 82 servinpj to permit the pedal 75) to immediately re: ssume its initial position.

As the table approaches the uppermost end of its travel, the resistance odered by the stoel: in engagement with the bits becomes exceedingly great. In the ordinary mechanially operated boring; machine, the portion of the frame of the machine supporting the bits, even though sturdily constructed, will frequently yield a little under such resistance in a direction away from the table as the latter passes through the upper most part of its movement, which yield is particularly pronounced when hard spots are encountered in the stock by one or more of the bits, with the result that there is very often a` laclr of uniformity in the depth of the holes bored in diferent pieces of stock operated on by the same boring machine with the same adjustment of bits.

This difliculty is avoided in the present machine. rllhe table l2 is raised and lowered by hydraulic power, and a relief valve 85 of suitable construction is placed in the pipe 18 and is connected with line 86 leading back to the low pressure side of the pump. lVhen the resistance offered by the stoel; in engagement with the bits becomes excessive at the speed at which the table is movi ng, the valve 85 bi-passes through the. line 86 some of the oil being' forced through the pipe 17, and the table slows up or even momentarily stops t0 allow the bits to fully complete their boring operation by the time that the table reaches its uppermost position and starts down.

I claim:

l. In a boring machine, a plurality of bits, a worlr support, means for moving the support toward and away from the bits, means for automatically reversing, the direction of movement of the support at both ends of its travel, manually actuated means for rendering the automatic reversing means inoperative, separately operable manually actuated means for starting and stopping` the movement of the support in any position thereof, and a single control member connected with the two last mentioned means for at will independently operating the same.

2. In a boring machine, a plurality of bits, a work support, means for moving the suping the automatic reversing means inoperative manuall actuated means forstartin" and stopping the movement of the support,`

and a single control member connected with the two last mentioned means for operating the same, said control member being shiftable in the direction of its axis to operate one of said means and beingrotatable about its axis to operate the other.

3. In a boring machine, a plurality of bits,

a worlr support, means for moving the support toward and away fromthe bits, means for automatically reversing the direction of movement of the support at both ends of its travel, manually actuated means for rendering the automatic reversing means inoperative,'manually actuated means for starting and stopping the movement of the support, and a single control rod connected with the two last mentioned means foroperating the same, said rod being shifted in the direction of its axis to operate the former and being rotated about its axis to operate the latter.

4. In a boring machine, a plurality of bits, a work support movable toward and away from the bits, a cylinder, a piston in the cylinder, aconnection between the piston and the support for transmitting the `movement of the piston to the support, a valve for delivering fluid under pressure to either end of the cylinder to move the piston, and a control rod connected with the valve to operate the latter, said rod being rotatable about its axis into one position to cause the tablev to travel upwardly, being rotatable into another position to cause the table to travel downwardly, being rotatable into still another position to cause the table to come to rest, and being shiftable axially to cause the table to automatically reverse its direction of movement when it reaches a predetermined point in its upward travel.

5. In a boring machine, a plurality of ver-V tically disposedr bits arranged in a horizontally elongated group, a horizontally elongated work support beneath the bits movable toward and away from the latter, a cylinder, a piston in the cylinder, connections between the piston and the ends of the support for transmitting the movement of the piston equally to both ends of the support, a valve yfor delivering fluid under pressure to either end of the cylinder to move the piston, and a manually operable controlv rod extending lengthwise of the support below and in front of the latter for operating the valve, said rod being movable into one position to cause the support to automatically reverse its direction of movement at predeterminedfpoints in both its upward and downward travel and being movable into another positionA to cause the support to automatically reverse its direction of movement at a predeterminedV point in only its upward travel.v

V6. In a boring machine, a plurality of vertically disposed bits arranged in a horizontally elongated group, a horizontally elongatedworlrsupport beneath the bits movable toward and away from the latter, a hy- -draulic cylinder, a piston in the cylinder, connections between the piston and the ends of the support for transmitting the movement of the piston equally to both ends of the support, a r-.f'alve for delivering fluid under pressure to either' endV of the cylinder to move the piston, and a control member connected with the valve to o-peratethe latter, said control member being movable into one position to cause the support to automatically reverse its direction of movement at predetermined points in both .its upward and downward travel and being movable into another position to cause the support to automatically reverse its direction of movement at a predetermined point in only its upward travel. i

7. In a boring machine, a horizontally elongated frame having vertically spaced upper and lower portions, a horizontally elongated group of vertically disposed bits mounted on the upper portion of the frame, a horizontally elongated work-supporting table mounted `on the lower portion of the frame beneath the bits for vertical movement toward and away from the latter, a horizontally extending shaft journaled in the lower portion of the frame Vbelow the table, means for rotating the shalt in opposite directions, connections between the shaft and the table adjacent the ends of the latter for raising the table when the shaft is turned in one direction and lowering the table when the shaft is turned in the other direction, and manually actuated means for controlling the starting, stopping and direction of rotation of the shaft.

` 8. In a boring machine, a horizontally elongated frame having vertically spaced upper and lower portions,a horizontally elongated Vshaft journaled in the lower portion of the frame below the table, connections between the shaft and the table adjacent the ends of the latterV for moving the table vertically when the sha-ft is oscillated, a'hydraulic cylinder mounted on the lower portion of the frame below the table, a piston in theV cylinder, a connection between the piston and the shaft for turning the shaft when the piston is moved., 'a valve for introducing fluid under pressure into either end of the cylinder to cause movement of the piston and consequent movement of the table, and actuating means for the valve including a manually operable control member mounted on the front of the lower portion of the frame adjacent the table. y 9. In a boring machine, a horizontally elongated frame having vertically spaced upper and lower portions, a horizontally elongated `group 01"' vertically disposed bits mounted on the upper portion of the frame, a horizontally y elongated work-supporting table mounted on lo the lower portion of the frame beneath the bits for vertical movement toward and away from the latter, a horizontally extending shaft journaled in the lower portion of the :trame below the table, connections between lr, the shaftand the table adjacent the ends of the latter for movingthe table vertically when tl e shaft is oscillated, a hydraulic cylinder mounted on the lower portion of the "frame below the table, a piston in the cylinder, go a connection between the piston and the shaft for turning the shaft when the piston is moved, a valve for introducing fluid under pressure into either end of the cylinder to cause movement of the pist-on and consequent 25 movement of the table, and actuating means for the valve includinga manually operable control rod mounted on the frame in a position lengthwise of the latter below and in front of the table for operation from any one of sev- 30 eral locations.

In witness whereof I have hereunto subscribed my name.

GERRIT VANDERBEEK. 

